learn more about instrumentation

mardi 2 décembre 2014

DCS vs. SCADADCS and SCADA are monitoring and controlmechanisms that are used in industrial installationsto keep track and control of the processes andequipment; to ensure that everything goes smoothly,and none of the equipment work outside thespecified limits. The most significant differencebetween the two is their general design. DCS, orData Control System, is process oriented, as itfocuses more on the processes in each step of theoperation. SCADA, or Supervisory Control and DataAcquisition, focuses more on the acquisition andcollation of data for reference of the personnel whoare charged with keeping track of the operation.DCS is process state driven, while SCADA is evendriven. DCS does all its tasks in a sequentialmanner, and events are not recorded until it isscanned by the station. In contrast, SCADA is eventdriven. It does not call scans on a regular basis, butwaits for an event or for a change in value in onecomponent to trigger certain actions. SCADA is a bitmore advantageous in this aspect, as it lightens theload of the host. Changes are also recorded muchearlier, as an event is logged as soon as a valuechanges state.In terms of applications, DCS is the system of choicefor installations that are limited to a small locale,like a single factory or plant, while SCADA ispreferred when the entire system is spread across amuch larger geographic location, examples of whichwould be oil wells spread out in a large field. Part ofthe reason for this is the fact that DCS needs to bealways connected to the I/O of the system, whileSCADA is expected to perform even when fieldcommunications fail for some time. SCADA does thisby keeping a record of all current values, so thateven if the base station is unable to extract newinformation from a remote location, it would still beable to present the last recorded values.Summary:1. DCS is process oriented, while SCADA is dataacquisition oriented.2. DCS is process state driven, while SCADA is eventdriven.3. DCS is commonly used to handle operations on asingle locale, while SCADA is preferred forapplications that are spread over a wide geographiclocation.4. DCS operator stations are always connected to itsI/O, while SCADA is expected to operate despitefailure of field communications....s.velmurugan

samedi 14 juillet 2012

The term industrial
equipment covers a very wide range of devices. These can include
everything from ball bearings and air tools to large bulldozers,
cranes, cement mixers and backhoes and just about everything in between
such as compressors, check valves, couplings, dollies and dust
collectors. Basically, just about any type of device that is used in the
industrial world could be considered to be industrial equipment. Some
types of industrial equipment are operated by manual labor while others
are power-generated.

All types of tools and equipment devices have been developed and
used by man since prehistoric times however the first forms of modern
industrial equipment were born along with the Industrial Revolution,
which took place in Europe during the 18th and 19th centuries. This
major technological and cultural change introduced the world to
machinery, which was created to replace and help make manual labor
easier. Steam power and powered machinery was suddenly developed for
the manufacturing world and with it came the first industrial metal
machine tools and industrial equipment.
As the industrial world began to grow new types of equipment and
machinery were developed. These tools and equipment were designed to be
powered by human and animal power along with such things as electrical,
solar, nuclear and water energy. Some devices are operated manually
while others such as robotics can be programmed to perform their
functions automatically. Some types of equipment such as levers and
hammers are simple tools while others such as hydraulic motors are
pieces of complex machinery.
While many articles of industrial equipment such as ladders, power
tools, hand tools, heaters, generators, and compressors can be used
around your home, office, cottage and garden, some devices are built to
a much larger scale and are made specifically for use in industrial
settings. Some of these articles include industrial heaters, industrial
carts, industrial forklifts, industrial vacuum cleaners, industrial
presses, industrial boilers, industrial ovens, industrial furnaces and
industrial scales etc. However, no matter where you use them, the one
thing that all articles of industrial equipment have in common is that
they were built and designed to make manual labor become faster and
easier.